Gas-burner



" 52"340' Patmed Map. 2a, |899. T. H. MuLcH & 0. wlEDEnHoLD.

G A S B U R N E B (Appucasion me@ sept, 22, 1897.)

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WITNESSES: Il 0 gw' fw md mw my WMV.

ATTORNEYS THE Nonms pneus co., wiocmJ'I-Ho.' wAsHxNsToN. n. c.

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THEODORE H. MULOH, OF NEW YORK, N. Y., AND OSCAR VIEDERHOLD, OF SUMMIT, NEW JERSEY.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 621,840, dated March 28, 1899. Application tiled September 22,1897. Serial No. 652,550. (No model.)

To all whom it may concern,.-

Beit known that we, THEODORE Il. MULCH, a resident of the city, county, and State of New York, and OSCAR WIEDERHOLD, a resident of Summit, Union county, State vof New Jersey, have invented certain new and useful Improvements in Gas-Burners, of which the following is a specification.

Our invention relates to gas-burners, more especially to Bunsen burners and incandescent gas-burners; and. it consists in the construction hereinafter set forth and claimed.

Our invention will be understood by referring to the accompanying drawings, in which-- Figure 1 is a vertical section of a structure embodying our invention. Fig. 2 is an enlarged `sectional view of the gas-inlet apparatus and the plug for regulating and controlling the flow of gas to the main burner. Fig. 3 is a plan View, partly in section, of the structure, Fig. 2, the section being taken on line 3 3 of Fig. 2. Fig. 4 is a section on line 4 4 of Fig. 2, looking upward. Fig. 5 is an exterior view of the burner proper with the burner-gallery, mantle, and mantle-supporting device removed; and Fig. 6 is-a section on line 6 6 of Fig. 5, showing the air-shutter and its casing.

It will be understood that the burner is capable of use with any suitable gas or vapor.

Referring to the drawings, ct is a gas-inlet plug bored axially atb for the passage of gas and provided with a valve seat or shoulder c, above which valve seat or shoulder the gasinlet plug a is hollowed out and internally threaded forthe reception of a threaded regulator-plug d. This regulator-plug d is provided with an axial passage d', which feeds the pilot-light and communicates with the axial opening h in the gas-inlet plug at all times, so that the axial openingb in the gasinlet plug will supply gas to the pilot-burner irrespective of the supply of gas to the main burner. Seated in or otherwise in communication with the passage cl' is a pilot-burner d2, which extends upward through the burner and terminates within the periphery of the mantle at the point cl3. The function of this pilot-burner is well known. The gas-regulator plug d is likewise pierced with a plurality of passages CZ, shown in the present instance as three passages placed one hundred and 'from the equal-izing-chamber into an inner casing or mixing-chamber e, which is a continuous uninterrupted chamber, whose lower edge e terminates at or near the top wall of the equalizing-chamber, so as to permit the inlet of' air to the mixing-chamber from the outer casing air-chamber f. The air-chamber f is a continuous uninterrupted casing extending from the point of ignition of the burner-flame. This air-chamber f surrounds the mixingchamber e and is preferably provided with a ring j", which supports the mixing-chamber below the screen g, as will be explained.

The air-chamber fis closed and provided with perforations f2 (best seen in Fig. 6) for the admission of air into the said air-chamber, which admission of air is regulated by an air-shutter h, shown in the present instance as aring seated in the air-.chamber and freely movable therein and p rovided with apertures registering with the apertures in the airchamber at suitable times. The air-shutter 7i may likewise be provided with stops 7L', which project through the apertures f2 of the air-chamber and serve to limit the movement of the air-shutter in the mixing-chamber and has handles or abutments for receiving the thrust of the finger or tool for adjusting the position of the air-shutter, so as to close` the openings in the air-chamber more or less when desired. 'The regulation and admission of gas to the burner are effected by manipulating the plug d. For this purpose the plug d is provided with an annular lip d8, which is adapted to rest upon the seat c of the gas-inlet plug a around the opening Z7 therein, so

that when the lip d8 is firmly seated upon the IOO under and around the lip ds, and through the passages d into the equaliZing-chamber d5, where the gas is distributed and allowed to pass through the apertures (ZT uniformly. The gas then receives its mixture of air by reason of the air-current passing under the edge e/ of the mixing-chamber, so that the air-and-gas mixture is made at the lowerend of the mixingchamber and passes upward through the said mixing-chamber to the main burner, the airand-gas mixture being heated by contact with the walls ot the mixing-chamber and airchamber, which receive heat from the burner, as will be well understood. The air comes to the lower edge ofthe mixing-chamber in the following manner: It passes in through the apertures into the air-chamber and thence downward between the walls of the air-chamber and the l mixing-chamber, which being heated will superheat the said air during its descent, so that the air arrives at the lower edge of the mixingehamber in a heated condition,where, as explained, it mixes with the gas and the mixture passes upward through the mixing-chamber and is furtherheated.

The parts so far described constitu te a Bunsen burner of a highly-improved type which may be used as an ordinary Bunsen burner or in conjunction with an incandeseing mantle to constitute an incandescent gas-burner, the following-described construction being the preferable one: the air-chamber may be provided with a shoulder t', upon which a gallery Yloosely rests, which gallery in turn supports a chimney-support k, shown in the present instance as an annular frame seated on a jog l of the gallery and provided with arms on, supporting a ring n, which closely hugs the upper end of the mixing-chamber of the burner. The burner-gallery likewise supports a mantle-support o, from which a mantle p is suspended, which extends downward and closely hugs the ring n, which acts as an additional support for the mantle and likewise to prevent the mantle from being displaced laterally by gusts of air or other causes. The lower ring 7; of the frame mentioned receives the lower edge of the chimney q, which chimney, as will be observed, extends downward and, covering the apertures f2 of the air-chamber, prevents air from blowing into the mixing-chamber in a horizontal current, so that in order to get to the apertures of the air-chamber the air must pass upward through the perforations in the screen ot the burner-gallery. Thus it will be observed that the air in order to reach the main burner must necessarily pass theretoin a very tortuons course, to wit: first, upward through the burner-gallery and chimney to the apertures in the aircha1nber,thenee downwardly between the air-chamber and the mixing-chamber, and thence upwardly through the mixing-chamber to the burner, so that by thus providing means for defiecting and diverting the air-current and bringing it to the burner-point in an extremely tortuous course we are enabled to bring a great quantity of air to the burner without danger of flashing back or flickering, and thus get rid of the necessity formerly existing of bringing air to the burner through restricted orifices and in small quantities. This large air-supply, as is well understood, will secure perfect combustion of the gas, so that all blackening or defacing of the mantle by reason of carbon deposits on the mantle or otherwise will be obviated. This voluminous air-supply likewise enables us to use our lamp in high altitudes, even in places where-heretofore other lamps of standard makes could not be used. The gallery and the chimney-supporting frame and mantle-supports form in the present instance one rigid structure, which may be readily slid oft the mixing-chamber without disturbing the Bunsen flame. lVe attain this object principally by making the ring 'n and gallery of a proper diameter to slide on the air-chamber. lfVe are also assisted in this object by a peculiar form of sieve employed in our burner. Instead of providing an ordinary sieve carried by a ring fitting over the mixing-chamber, as has been usual heretofore and which would render it extremely inconvenient if not impossible for us to slide the mantle-carrying and chimneysupporting devices over the mixing-chamber without disturbing the Bunsen flame, we provide a sieve g in the form of a sieve-basket, fitting into the mixing-chamber and not over the mixing-chamber, so as to leave the exterior chamber of the mixing-chamber smooth and unbroken by any ring or other device for supporting the sieve. It will be obvious, however, that instead of forming the entire sieve-basket with meshes we may provide a ring fitting into the mixing-chamber and carrying a sieve, the essential feature being that the exterior surface of tlie mixingchamber shall present no obstruction to the free movement up and down of the mantle and chimney supporting devices so as not to hinder the ready removal of the mantle and chimney from the burner without disturbing the Bunsen flame. It will likewise be observed that the air-sh utter is inaccessible from the outside of the burner unless the gallery and its adjunetive parts be lifted oft the burner, so that the air-shutter once set cannot be reset except bylifting oft the mantle and chimney, so that all danger of accidental closure of the air-shutter with its attended evils is obviated. It will likewise be observed that for the purpose of rotating the gas-regulating plug so as to regulate the flow of gas to the light we have provided a pivoted sector 7', provided with the usual pulls s, which sector gears with the lower edge of a toothed ring which surrounds the gas-plug and the lower' end ot' the mixing-chamber casin g. lVe likewise provide means for regulating the flow of gas in the main orifice and in the by-pass or pilot-burner tube, which means are shown in the present instance as IOO IOS

IIO

a screw u, passing into the main gas-supply orifice b, and a screw o, passing into the axial opening in the gas-regulator plug which supplies the pilot-burner.

What we claim, and desire to secure by Letters Patent, is-

l. In an incandescent gas-burner, the combination with a mantle of a regenerative Bunsen burner comprising the following instrumentalities in operative combination, to wit: a continuous heat-conducting outer casing extending from the point of ignition of the Bunsen iiame downward around the mixingchamber and comprising the air-chamber of the burner, the said casing being directly heated by the Bunsen llame and being pierced below the point of ignition of the Bunsen flame with openings for the influx of air, an inner casing comprising the mixing-chamber adapted to deliver an air-and-gas mixture to the Bunsen flame receiving heat by conduction from the outer casing and extending downward within the outer casing and terminating at or near the bottom thereof,whereby an annular air-passage is produced between the said chambers, means for closing the top of the said air-passage so as to form 'an annular chamber closed at the top and a gas-inlet arranged in proximity to the lower end of the mixing-chamber and adapted to deliver gas thereto, whereby the outer and inner casings may be efficiently heated by heat conducted from the Bunsen iiame so as to heat theair and the air-and-gas mixture, all arranged so that the air will enter the apertures of the air-chamber, will pass downward through the airpassage and be efficiently heated and thence pass upward through the mixing-chamber to the Bunsen flame.

2. In an incandescent gas-burner, the combination with a mantle of a regenerativeBunsen burner, comprising the following instrumentalities in operative combination, to wit: the external continuous uninterrupted heatconducting outer casing f comprisin g the airchamber and receiving heat from the Bunsen flame, the continuous uninterrupted inner casing e comprising the mixing-chamber and receiving heat from the outer casing, the annular partition f intervening between the two chambers land closing the top of the annular space between them and serving to conduct heat to the inner casing from the outer casing, the said outer casing being pierced at or near the said partition for the passage of air and the said inner casing extending downward into the outer casing to a point at or near the bottom thereof and adapted to deliver an air-and-gas mixture to the Bunsen flame and a gas-.inlet in proximity with the lower end of the chamber e, whereby the air will be compelled to pursue a tortuous course and will be heated by contact with the walls of the two oasings, substantially as described and for the purposes set forth.

3. In a gas-burner, the combination with means for consuming gas, of an internally-4 screw-threaded sleeve, an externally-screwthreaded gas-regulator plu g,the screw-threads of the plug and sleeve being in engagement, the said gas-regulator plug being provided with a passage therethrough normally open to allow gas to pass to a pilot-burner, the said plug being likewise passaged to conduct gas from a gas-inlet to a main burner, a seat'cooperating with the plug' and means for prod-ucing a relative movement between the sleeve and plug to engage the seat and plug together.

4. In a gas-burner, the combination with means for consuming gas, of a screw-threaded gas-regulator plug provided with a passage therethrough normally open to allow the passage of gas to a pilot-burner, the said plug being likewise passaged to conduct gas from a gas-inlet to a main burner and a seat cooperating with the plug and means for rotating the plug, whereby the plug will be brought into engagement with its seat.

5. In a gas-burner, the combination with means for consuming gas, of a gas-inlet provided with a seat, a rotatable screw-threaded plug cooperating with said seat and provided with a passage therethrough for conducting gas to a pilot-burner and likewise passaged for conducting gas from the gas-inlet to a main burner, and an equalizing-chamber carried by the rotatable plug and in communication with themain burner.

6. In a gas-burner, the combination of a gas-inlet, a seat, a rotatable screw-threaded plug apertured centrally for the passage of gas to a pilot-burner and likewise containing a plurality of passages around the said central passage, and means for rotating the said plug whereby it may be brought against its seat and the ow of gas to the passages surrounding the central passage controlled.

THEODORE H. MULCH. OSCAR VI'EDERHOLD.

Witnesses: n

GEo. E. MORSE, MAURICE BLOCK." 

